condition mean min max ZT0-3 122.55 122.55 122.55 ZT4-7 131.3 131.3 131.3 ZT8-11 234.25 234.25 234.25 ZT12-15 302.55 302.55 302.55 ZT16-19 175.0 175.0 175.0 ZT20-23 248.85 248.85 248.85